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block: introduce bdev_dma_alignment helper

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Preparing for upcoming dma_alignment users that have a block_device, but
don't need the request_queue.

Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220610195830.3574005-5-kbusch@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Keith Busch 2022-06-10 12:58:23 -07:00 committed by Jens Axboe
parent 3850e13f28
commit 4a2dcc3591
1 changed files with 5 additions and 0 deletions
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5
include/linux/blkdev.h
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@ -1365,6 +1365,11 @@ static inline int queue_dma_alignment(const struct request_queue *q)
return q ? q->dma_alignment : 511;
}
static inline unsigned int bdev_dma_alignment(struct block_device *bdev)
{
return queue_dma_alignment(bdev_get_queue(bdev));
}
static inline int blk_rq_aligned(struct request_queue *q, unsigned long addr,
unsigned int len)
{